Am I stuck with what I buy today or will companies upgrade?

When we got Josh’s insulin pump two years ago this month, the general rule with insurance and pump companies was the insulin pump you buy today will be your pump for four years (excluding any malfunctions, then the pump can be replaced). After four years you could upgrade or switch to an entirely new insulin pump company.  However the fast pace of innovation has started to change the rules as pump companies aim to get upgrades into...